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Sankei
@sankei.com · 1 hour

世界最長の青函トンネル開通38年 海面下240mで進む「老い」と格闘する保守の最前線

世界最長の青函トンネル開通38年 海面下240mで進む「老い」と格闘する保守の最前線
開通38年の青函トンネルは、高湿度と海水浸入により設備の劣化が進行。共同通信はJR北海道の許可を得て、トンネル内部の保守作業を取材した。北海道新幹線開業10周年を前に、老朽化との闘いの最前線が明らかになった。坑内は80~90%の高湿度に保たれている。
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